How can glass coated lens 532nm green dot laser module work constantly?

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No matter dot measuring work is processing at close or long distance, the usual use of a 532nm green dot laser module always brings users quite satisfied dot measuring results as expected. It projects the most visible green laser light from a middle wavelength 532nm green DPSS laser system. When it gets basic use of thermal emitting and different dimension metal housing tube, only after its proper installation and adjustment to correct position, it brings users the most precise and the clearest green dot projection at long distance.